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M. MONDRAGON.

BREBGH LOADING BOLT GUN.

No. 557,079. Petenlted Mer.. 24, 1896.

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M. MONDRAGON. BREEGH LOADING BOLT GUN.

Patented Mar. 24, 1896.

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MMONDRAGON. ,BREBGH LOADING BOLT GUN. No. 557,079. Patented Mar. 24,1896.

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lilNiTED STATES PATENT OYEEICE.

MANUEL MONDRAGON, OF MEXICO, MEXICO, ASSIGNOR TO LECLERCQ &

' HIRT, OF LIEGE, BELGIUM.

BREECH-LOADING BOLT-GUN.

'SPECIFICATION forming part of Letters Patent No. 557,079, dated March24, 1896.

' Application filed February 8,1893. Serial No. l161,476. (No model.)Patented in Belgium March 23, 1892, No. 98,947, and in France April 20,1892, No. 221,035.

To all whom t may concern:

Be it known that I, MANUEL MoNDRAGoN, a citizen of the Republic ofMexico, and a.resident of Mexico, (Palacio Nacionah) in the Republic ofMexico, have invented certain new and useful Improvements inBreech-Loading Firearms, (for which I have obtained Letters Patent inBelgium, No. 98, 947, dated March 23, 1892, and in France, No. 221,035,dated April 20, 1892,) of which the following is a specification.

This invention relates to improvements in breech-loading firearms inwhich the breech is opened and closed by moving the breechbolt forwardand backward in line of the axis of the barrel.

The invention consists in thecombination with a breech-casing ofaguide-bar on which the slide is mounted that is provided with aprojecting pin passing into a spiral or inclined groove of thebreech-bolt. The slide transmits to the breech-bolt a reciprocatingmovement and during the course of said movement turns the breech-boltaxially, so as to permit a latch on the slide to pass into an apertureon the breech-bolt, so that the breech-bolt after having been turnedmoves only in the direction of its length. A plate having a tapering endand secured on the breech-casing serves for the purpose of automaticallydisengaging the latch 'when the breech-bolt is to be turned axially. Thebreech-bolt is provided with a series of ribs, and two correspondingseries of ribs are provided on the breech-casing, which ribs havebeveled ends, so that when the breech-bolt is turned axially it islocked doubly secure.

The invention further consists in the attachment of means by which thegun can be fired automatically-` In the accompanying drawings, Figure 1is a side view of my improved breech-loading firearm, parts being insection and the breech closed by the bolt. Fig. 2 is a plan view of thesame, parts being broken out. Fig. 3 is a vertical transverse sectionalview on line 3 3 of Fig. 1. Fig. 4 is a vertical transverse section online 4 4 of Fig. 1. Fig. 5 is a vertical longitudinal sectional view ofthe breech of the iirearm, showing the breech-bolt being removed and thetrigger being locked for automatic firing. Fig. G is a side view of thebreech part of the firearm, showing the breechbolt and latch after thefirst part of the movement toward the rear; and Fig. 7 is a sectionalplan view on the line 7 7 of Fig. 5. Fig. 84is a plan-view of the meansfor moving forward the breech-bolt, parts being broken ont.

Similar letters of' reference indicate corresponding parts.

The breech-bolt l) of the gun is provided at the front and near the rearend with two rows of short longitudinal ribs 1)112, separatedcircumferentially a short distance from each other, as shown in Figs. 1,2 and 6, and the breech-casing a of the gun is provided with two sets ofcorrespondingly-longitudinal short ribs a' a2 on the inner surface,which ribs are separated circumferentially from each other a distanceequal to the width of the ribs b/ b2, as shown on Fig. 5. The two setsof ribs on the breech-bolt and breech-casing are so arranged that whenthe breech-bolt b is inserted into the breech-casing a the bolt must beturned in order to permit the ribs b b2 to pass through the groovesbetween the ribs a a2.

. The breech-casing has at one side a guidebar c, Figs. 1 and 3, uponwhich the slide d, provided with a head or handle CZ', can move in thedirection of the length of the barrel. The slide d is provided with aprojecting pin do, Figs. 1 and (5, that passes into an inclined orspiral groove bo, Figs. 1, 2 and G, of the breech-bolt b.

During the forward and backward movements of the slide d on theguide-bar c the breech-bolt is moved in the direction of the length ofthe axis of the barrel in the breechcasing, but in such a manner that atthe beginning of the movement toward the rear, and likewise at the endof the movement toward the front, said breech-bolt is turned by theaction of the pin d0 on the edges of the groove bo. The bolt is turnedaxially and by this movement causes the breech-bolt to close absolutelytight, as the ribs bl and a 01,2 have their ends beveled, and by theaction on each other of the beveled ends of said ribs the breech-bolt isforced to the front.

IOO

Upon the beginning of the opening movement of the bolt, said bolt isiirst turned axially to unlock the same, and at the same time thecartridge,which is gripped by the well-known extractor-jaws, (not shownin this case,) is loosened. In order that the axial movement of thebreech-bolt should begin and cease at the proper time, an adjustingdevice is provided, which'consists of the latch e, Figs. 2, 3, and 8,which is provided with a pin that passes into an aperture in the knob dof the slide and is pressed by a spring e0 toward the axis of the barreland breech, wherebythe pin e of the latch passes into the aperture b3ofthe bolt. Said pin e can only pass into the aperture b3 when the slided with the pin d0 has traversed the length of the inclined or spiralgroove 50 and has turned the breechbolt axially, and when the latch ehas arrived at the curved tapered end of the plate f attached to thebreech-casing a, when said pin e can be pushed forward by its spring.Vhen moving the breech-block toward the front, an axial movement for thepurpose of forcing the breech forward can only take placel after thelatch e has been pressed outward by the curved end of the plate f, andthereby the pin e moved out of the aperture of the breech-bolt. (SeeFigs. 2 and 8.) By reason of the double row of locking-ribs b' b2 and a/d2, the breech-bolt is locked doubly secure and the rear ribs c2 act asstops for the bolt b. The breech-casing a is further provided with anattachment which permits of firing the gun automatically or withoutvoperating the trigger g. The trigger-spring t', Fig. '7, is cutlongitudinal, so as to consist of two spring-Shanks z" and i2, of whichone shank, t, can be pressed downward by the arm g/ of the trigger, asshown in Fig. 5, whereas the other shank, 2, is not acted upon. As thebreech-bolt moves not only longitudinally when closing the breech, butalso moves axially, the iiring-pin,which is provided With a lug hprojecting through a longitudinal slot b4 in the breech-bolt, mustparticipate in this axial movement, and when the trigger is held in theposition shown in Fig. 5 the lug h of the firing-pin iirst engages theend of the shank i2 of the trigger-spring. As said axial movementcontinues until the lug 71, arrives above the end of the shank 1l of thetrigger-spring, and when said trigger-spring is held in loweredposition, said lug h cannot engage the same and consequently isreleased, permitting the firing-pin to be forced forward by its springto explode the cartridge. The trigger is held in position, as shown inFig. 5, by an arm 7c on the shaft 7a, which shaft can be turned by meansof a small spring-lever m iixed on said shaft within a proper recess inthe side of the stock, a projection of said leverm snapping into thedepression of a plate Zon the side of the stock, whereby said lever m islocked in place and also locks the trigger in place, as shown in Fig. 5.

For the purpose of locking the loaded firearm in such a manner that itcannot be fired, the spring-lever m is turned so that the hook k2 on theshaft 7o engages the lug h2 of the trigger-lever, (see Fig. 1,) thuspreventing the latter from being operated. ln this position also thespring-lever snaps into a suitable depression for the purpose of lockingsaid spring-lever m and the trigger in place. lf the lever fm is lockedin a position midway between those described, it permits the trigger tobe operated in the usual manner, and the gun can be loaded and iired inthe usual manner.

Having thus described my invention, l claim as new and desire to secureby Letters Patentl. In a rearm, the combination, with a breech-casing,of a longitudinally-movable and axially rotative breech -bolt, providedwith an inclined or spiral slot, a slide guided on the breech-casing, apin projecting from the slide into the incline or spiral groove of thebolt, and a latch on said slide, being pressed by a spring into anaperture of the bolt, substantially as set forth.

2. In a iirearm, the combination, with a breech-casing, a guide-barattached to the side of the casing, a slide mounted on said bar, a pinprojecting from the slide, a longitudinally-movable and axially-rotativebreechbolt, having an inclined or spiral groove into which the pin onthe slide passes, and a latch on said slide being pressed by a springinto an aperture of the bolt, substantially as set forth.

3. In a irearm, the combination, with a breech casing, of alongitudinallymovable and axially-rotative breech-bolt having aninclinedor spiral groove, a slide guided on the breech-casing, a pinprojecting from said slide into the inclined spiral groove, a latch onthe slide which latch can pass into an aperture in the breech-bolt,and'a plate having a tapered or curved end and being secured on thecasing in the line of movement of said latch, substantially as setforth.

4L. In a firearm, the combination with a breech-casing, of alongitudinally-movable and axially-rotatable breech-bolt, a firing-pinin said bolt which is provided with a lug projecting through a slot inthe breech-bolt, and a projection arranged in the path of thelongitudinal movement of the firing-pin and forming a stop, said lugbeing enabled to rotate with the breech-bolt and adapted to slide offthe stop when the bolt is turned axially, substantially as set forth.

' 5. In a iirearm, the combination with a breech casing, of alongitudinally -movable and axially-rotatable breech-bolt, a firing-pinadapted to rotate with the bolt, a lug on said pin projecting through aslot in the breechbolt, a trigger-spring having two Shanks, eachprovided with a projection extending into the line of movement of thelug on the firing-pin, and a trigger for actuating or depressing one ofsaid shanks while the projection of the IOO IIO

stock and provided with two arms, one of which is adapted to engage thesaid lug on the trigger and hold the same in forward position, while theother is adapted to engage the trigger and hold it in backward or pulledposition, substantially as set forth.

In testimony whereof I hereunto sign my name, in the presence of twosubscribing witnesses, this 23d day of January, 1893.

MANUEL MoNDRAGoN.

W'itnesses:

C. SANCHEZ NAVARRO, JOSE REYES.

